informal Definition

unofficial, casual, intimate, conversational, cozy, friendly, folksy, epistolary, familiar, colloquial, vernacular, slangy, everyday, common, loose, unceremonious, nonliterary, vulgar, unceremonial, epistolatory, free-and-easy, subliterary, unliterary, formal, impromptu, amicable, informational, amiable, consultations, unorganized, spontaneous, improvised, unstructured, structured, regular, atypical, makeshift, tacit, irregular, official, unregulated, unconventional, nonprofessional, unplanned, underground, armchair, extrajudicial, individual, unorganised, unincorporated, extracurricular, parallel, officious, undeclared, untrained, precarious, room, associate, information, black, not, without, shadow, ad-hoc, after-school, closed-door, off-the-record, out-of-court, out-of-school, over-the-counter, self-learning, semi-official, grey, symbol, convivial, semiformal, collegial, congenial, participatory, constructive, businesslike, leisurely, genteel, comradely, cordial, consultative, talk shop, socializing, neighborly, voluntary, quadripartite, lively, confidential, collocution, dialogical, anonymous, nonhierarchical, adversarial, daylong, freewheeling,